Dyfyniad APA

Gamma, E., Helm, R., Johnson, R., & Viissides, J. (1995). Design patterns: Elemets of reusable object - oriented software. Boston: Addison - Wesley.

Dyfyniad Arddull Chicago

Gamma, Erich, Richard Helm, Ralph Johnson, và John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.

Dyfyniad MLA

Gamma, Erich, Richard Helm, Ralph Johnson, và John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.